. A treatise on some of the insects injurious to vegetation . Insect pests. 470 LEPIDOPTEKA. der the trees, in the autumn, with the hope of crushing some of the chrysalids by so doing, and of exposing others to perish with the cold of the following winter. If hogs are then allowed to go among the trees, and a few 'grains of corn are scattered on the loosened soil, these animals will eat many of the chrysalids as well as the corn, and will crush others with their feet. Mr. S. P. Fowler* thinks it better to dig around the trees in July, while the shells of the insects are soft and tender. He and
. A treatise on some of the insects injurious to vegetation . Insect pests. 470 LEPIDOPTEKA. der the trees, in the autumn, with the hope of crushing some of the chrysalids by so doing, and of exposing others to perish with the cold of the following winter. If hogs are then allowed to go among the trees, and a few 'grains of corn are scattered on the loosened soil, these animals will eat many of the chrysalids as well as the corn, and will crush others with their feet. Mr. S. P. Fowler* thinks it better to dig around the trees in July, while the shells of the insects are soft and tender. He and Mr. John Ken- rick, of Newton, Mass., advise us to remove the soil to the distance of four or five feet from the trunk of the trees, aifd to the depth of six inches, to cart it away and replace it with an equal quantity of compost or rich earth. In this way, many of the insects will be removed also; but unless the earth, thus carried away, is thrown into some pond-hole, and left covered with water, many of the insects contained in it will undergo their transformations and come out alive the next year. Canker-worms are subject to the attacks of many enemies. Great numbers of them are devoured by several kinds of birds, which live almost entirely upon them during their season. They are also eaten by a very large and splendid ground-beetle ( Galosoma scru- tator), (Pig. 234,) that ap- pears about the time when these insects begin to leave the trees. These beetles do not fly, but they run about in the grass after the canker-worms, and even mount upon the trunks of the trees to seize them as they come down. The potter-wasp (JEummes * See Yankee Farmer of July 18, 1840, and New England Farmer of June 2, 1841, for some valuable remarks by Mr. Fowler. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harri
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